Messages in this thread Patch in this message | | | Date | Sat, 27 Aug 2022 13:19:27 +0800 | From | Puyou Lu <> | Subject | [PATCH] irqchip/gic-v3: do runtime cpu cap check only when necessary |
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Now cpu cap check is done every exception happens on every arm64 platform, but this check is necessary on just few of then, so we can drop this check at compile time on others. This can decrease exception handle time on most cases.
Fixes: 6d4e11c5e2e8 ("irqchip/gicv3: Workaround for Cavium ThunderX erratum 23154") Signed-off-by: Puyou Lu <puyou.lu@gmail.com> --- drivers/irqchip/irq-gic-v3.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 262658fd5f9e..3f08c2ef1251 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -237,9 +237,11 @@ static void gic_redist_wait_for_rwp(void) static u64 __maybe_unused gic_read_iar(void) { +#ifdef CONFIG_CAVIUM_ERRATUM_23154 if (cpus_have_const_cap(ARM64_WORKAROUND_CAVIUM_23154)) return gic_read_iar_cavium_thunderx(); else +#endif return gic_read_iar_common(); } #endif -- 2.17.1
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